Improvement in kilns for baking emery-wheels



UNITED STATES WILLIAM ESTY, 0F FITCHBURGfASSIGNOR Tt) VITRIFIED WHEELAND EMERY COMPANY, OF ASHLAND, MASSACHUSETTS.

l IMPROVEMENT-'IN KILNS FOR BAKING EMIRVWHEELS.

Specification forming part of Letters Patent'No. 192,059, dated June 19,1877; 'application tiled January 9, 1877.

To aLL'fw/Lom it may concern Be it known that I, WILLIAM EsTY, ofFitchburg, in the county of Worcester and State of Massachusetts, haveinvented certain new and useful Improvements in Kilns forBakingEmery-Wheels, and for other purposes, of which the following,taken in connection with the accompanyingdrawings, is a specication.

My invention relates to a kiln or furnace for baking emery-wheels orother artificial stone,

and has for its object a more even distribution or application of heatto all parts of the stone than has heretofore been accomplished; and itconsists in the use, in a chamber contiguous to the fire-box of thefurnace or kiln, and through which the hot gases and other products ofcombustion have to pass from the fire-box to the chimney, of one or morecircular platforms or disks embedded in the rebrick licor of saidchamber, uponwhich the molded stones to bel baked, inclosed in seggarscomposed of fire-clay, are placed, said platforms being adapted to beautomatically rotated about a vertical axis, so that every part of theperiphery of the stone is succes ively presented to the hottest part ofthe re.

My invention further consists in `forming upon the under side of saidrotary platforms `or disks an annular rib projecting down.

ward therefrom, in combination with an annular groove or trough filledwith sand, powdered soapstone, or equivalent material, in which saidannular rib revolves, as a means of packing said disks, to prevent airfrom entering the furnace, except through the fire.

My invention further consists in the combination with a kiln or furnaceof one or more disks, sunk in recessesin the tloor of thecombustion-chamber, and mounted upon vertical shafts of one or moreratchet-wheels, one or more reciprocating-bars carrying one or morepawls adapted to engage with said ratchet.

wheels, and a lever adapted to impart reciprocating motion to said barsas will be described.

Figure 1 of the drawings is a front elevation of my improved kiln. Fig.2 is a vertical section on line 'u c on Fig. 1. Fig. 3 is a hori--volving disks.

zontal section on line :vx on Figs. 1 and 4. Fig. 4 is a verticalsection on line y 3/ on Fig. 3. Fig. 5 is a horizontal section on line zz on Fig. 4, and Fig 6 is ani enlarged partial secj tion, showing themethod of packing the re- AA A A are four fire-boxes provided withsuitable grates a a, and B B B B are the ashpits, each to be providedwith suitable doors, (not shown.) G G are the bridge-walls between thelire-boxes A A, and the combustionchamber or oven D, in the center ofwhich opens the descending flue b, communicating with the horizontalflue c, leading to the chimney E.

The floor of the chamber D, made of tirebrick, has formed in it one ormore sunken recesses or openings, F, circular in form, in the bottom ofeach of which is formed an annular groove or trough, d, which may beformed in the fire-brick, or the bottom of the recess may be made ofmetal, and the inner wall of the annular groove d be formed by a raisedrib cast on said bottom plate, as shown in Figs. 4 and 6.

Within the recess F is placed a circular metal disk, G, mounted upon theupper end of 4the vertical shaft c, and provided with the downwardlyprojecting annular rib g, the lower edge of which extends nearly to thebottom of the trough d, as shown in Figs. 4 and 6. The trough d isnearly lled with dry sand, powdered soapstone, or equivalent ma terial,packed closely around the rib g, which revolves therein, thereby packingthe joint and preventing air from entering the oven or chamber D aroundsaid disks.

The shafts -e are mounted in suitable bearings, and have each securedfirmly thereon a ratchet-wheel, h, located in the chambers H below thefloor of the chamber D.

I is a three-armed lever pivoted at z, and engaging by its two oppositearms with the two long bars or rods j, and adapted to impart thereto areciprocating motion in opposite directions, and through the pawls k ksecured to said bars engaging with the ratchetwheels h impart anintermittent rotary motion to the disks ,Gr.-

In practice the disks G will be located with their upper surfacessomewhat'below the level of the oor of the chamber D, and will havetheir upper surfaces protected from the great heat of the furnace, bybeing covered with a circular disk of tire-brick l, as shown at theleft-hand side of Fig. 4,. and in Fig. 6. Jis a door opening into thechamber D, through which the stones to be Vbaked may be placed inpositionon the disks G.

What I claim as ncw,.and desire to secure by Letters Patent of theUnited States, is-

1. In combination with the combustioncham ber of a furnace or kiln, oneor more circular disks or platforms sunk in suitablerecesses formed forthe purpose in the floor of said combustion-chamber, and adapted to beautomatically rotated about a vertical axis, substantially as and forthe purpose described.

2. In combination with the combustion-chamber of a furnace or kiln thedisk G, provided with the.downwardly-projecting annular rib y, .the.annulantrough (Land, a packingodry sand, powdered soapstone, or othergranulated material nearly filling the trough d, and surrounding thelower edge of the rib g, substantially as and for the purposesdescribed.

3. The l combination with the combustionchamber of a furnace vor Vkilnvvoffone or more ldisks Gr, mounteduponlyertical shafts, one or moreratchet-wheels h, one or more recipro- .eatingbars oneor morevpawls k,and 'a single operating-lever, Lallarranged and co-operating, as setforth, to impart an intermittent rotary motion to any object placed uponsaid disks, substantialli;1 as and for the purposes described.

